Self-centering rocking steel bridge piers for seismic regions

地震区自定心摇摆钢桥墩

• 批准号: 519909-2017
• 负责人: Alam, Shahria
• 金额: $ 4.08万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697597
• 关键词: Self; centering; rocking; steel; bridge

The proposed research will introduce prefabricated post-tensioned steel bridge pier that will not only enable structures to be built faster but also help structures self-center after major earthquakes. Performance-based design is becoming a standard practice for seismic design and evaluation of structures in order to achieve a reliable and satisfactory level of performance. However, there has been no study on the seismic performance of such self-centering bridge structures. This research will help develop proper understanding and knowledge about the behavior of such bridges through extensive nonlinear finite element simulation, laboratory experiment through quasi-static reverse cyclic loading and shake table testing. The numerical simulations and extensive testing will be performed to determine the effect of different parameters including the steel strength, dimensions, amount of post-tensioning force and energy dissipator characteristics on its behavior, and the design requirements. This will help us develop performance-based design guideline for such bridges, which will be further validated by designing and fabricating steel bridge piers as per the proposed guideline and testing them on shake table. This study stems from a previous NSERC Engage grant pursued with Rapid Span Group, which is now translated into a four year research project supported by Canadian Institute of Steel Construction (CISC), Rapid Span Group, Emil Anderson Construction (EAC), Klohn Crippen Berger (KCB) and S-FRAME Software Inc. This project will assist engineers/practitioners in examining the interaction among different components of the bridge under lateral loads, and evaluate its limit states, and determine adequate section sizes and connection details and provide design guidelines. The overarching goal of this research project is to fill a major worldwide gap in creating innovative, rapid, low-cost and reliable construction for structural systems. The proposed prefabricated steel elements, connected through post-tensioning and innovative fastening devices will not only enable structures to be built faster but also help structures self-center after major earthquakes. This research will position Canada as a global leader in this field.

拟议的研究将引入预制后的钢桥码头，这不仅可以使建筑物更快地建造，而且还可以帮助大地震后结构自动核心。基于绩效的设计正在成为对结构的地震设计和评估的标准实践，以实现可靠和令人满意的性能水平。但是，尚未对这种自我居中的桥结构的地震性能进行研究。这项研究将有助于通过广泛的非线性有限元模拟，通过准静态反向循环载荷和摇桌测试来发展有关此类桥梁行为的适当理解和知识。将进行数值模拟和广泛的测试，以确定不同参数的影响，包括钢强度，尺寸，张紧力的量和能量消散器特征对其行为以及设计要求。这将有助于我们为此类桥梁制定基于绩效的设计指南，这将通过根据建议的指南设计和制造钢桥墩来进一步验证，并在Shake Table上对其进行测试。这项研究源于以前的NSERC参与赠款与快速跨越组的拨款，该批准现在被加拿大钢铁造型研究所（CISC），快速跨度小组，Emil Anderson Construction（EAC），Klohn Crippen Berger（KCB）（KCB）和S-Frame软件中的各个项目互助互动的互动率在不​​同的互动中，该项目将在四年的研究项目中转化为四年的研究项目。并确定足够的截面尺寸和连接详细信息，并提供设计指南。该研究项目的总体目标是填补在创造创新，快速，低成本和可靠的结构系统构造方面的主要空白。通过后张紧和创新的固定设备连接的拟议的预制钢元素不仅可以使建筑物更快地建造，而且还可以帮助大地震后结构自动核心。这项研究将使加拿大成为该领域的全球领导者。